carb adjustment

how many turns should i turn the screws on my 17.5 carb running on a 70cc? could this affect the speed? thanks

 

Are you talking about the idle screw ?

 

both haha , it cuts out wen i let off the revs

 

Try adjusting the idle screw as shown in this video, also what size main jet do u have in ?

 

which screw is which? there are 2

 

The idle screw is the one you can turn with your fingers with a spring and the mixture screw is the flat head screw

 

okok which one should i touch? could the mixture screw be affecting my speed if its not set right? and how many turns should they both be on roughtly? thanks

 

try the mixture screw first

 

ok thanks , will do it tomoz as its too dark , do you know how many turns it should be open though :/ ?

 

1 1/2 turns mate

 

ok thanks , and the idle one shall i just try till it sounds right? like do the mixture one as tight as i can then open it 1 1/2 turns , then the idle one i do all the way up then open it till it sounds right? thanks

 

np, switch your bike on and just adjust it from there rev it ocassionally so u can here when its changing, when it sounds about right then its tuned like on the video i showed u and for the idle screw get a flat head screw driver i think it is or a star one not sure and do the same thing as the man did on the video

 

thanks m8 will let u know how it goes tomoz

 

Ok inbox me pal

 

it was open 4 turns ? i have opened it 1 1/2 and no difference , and the idle screw doesnt change anything and it still cuts out ?? any more ideas?

 

the needle is on the highest notch btw